# Format a text field
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When you format a text field, you can choose how to display null values using the **Field list** pane, an on-visual editor, or a visual field well.

**To choose how to display a text field's null values**

1. Choose one of the following options:
   + In the **Field list** pane, choose the selector icon to the right of the number field that you want to format. 
   + On any visual that contains an on-visual editor associated with the percent field that you want to format, choose that on-visual editor. Expand the **Field wells** pane, and then choose the field well associated with the number field that you want to change.

1. Choose **Format**, and then choose **More Formatting Options**. 

   The **Format data** pane opens. 

1. Expand the **Null values** section and choose whether to display null values as `null` or as a custom value. Using `null` is the default.